Trudeau, Trump continue fight on trade after Trump leaves G7

Mr Trump is leaving early to head to Singapore for his landmark summit with North Korean leader Kim Jong-un, meaning he will miss some of the topics advanced by Mr Trudeau.

"We are committed to take concrete action to defend our democratic systems from foreign threats and take co-ordinated action to identify and hold to account those who would do us harm", Trudeau said.

In their communique, the leaders of the United States, Canada, Britain, France, Italy, Germany and Japan agreed on the need for "free, fair, and mutually beneficial trade" and the importance of fighting protectionism.

In today's postings, Trump says he is heading to Canada for G7 talks that will mostly centre on the longtime, unfair trade practices aimed at the United States.

But tensions had already been seething over trade after the Trump administration confirmed on May 31 it would apply additional tariffs on steel and aluminum imports from Canada, Mexico, and European Union countries, ending a two-month exemption period.

Sources tell CBC News the USA will commit to lowering trade tariffs, but will leave its name off a commitment to implement the Paris climate agreement.

Canada last week announced retaliatory tariffs on C$16.6 billion ($12.8 billion) worth of USA exports and said it will challenge US steel and aluminum tariffs under the North American Free Trade Agreement and the World Trade Organization.

The EU said it will impose the "rebalancing" tariffs on about $3.3 billion (2.8 billion euros) worth of USA steel, bourbon, agricultural products including sweet corn, orange juice, cranberries and certain clothing made of cotton. "I think it would be an asset to have Russian Federation back in, I think it would be good for the world, I think it would be good for Russian Federation, I think it would be good for the USA".

"The United States has been taken advantage of for decades and decades and we can't do that anymore. And we're not going to be able to do that work when our retaliatory tariffs, which are real, they're significant", Morneau said in a Saturday interview.

Trump said that would be a bad idea. The group used to be called the G8 before Russia's membership was suspended in 2014 after the outbreak of the Ukrainian crisis.

French President Emmanuel Macron described it as a good first step that represented the G7 nations' desire to stabilise the situation.

US President Donald Trump boards Air Force One prior to departure from Canadian Forces Base Bagotville in Canada, June 9, 2018.

After an angry tirade on Twitter on Thursday night, in which he lashed out at Trudeau, the summit host, and French President Emmanuel Macron, Trump used the afternoon session to run through his litany of complaints, citing specific trade deficits between the USA and allies in certain sectors.

Trump insisted USA allies would yield to his demands of a trade rebalance, warning that the U.S. would crush any opposition in a potential trade war.

"We are looking for peace in the world, we are not looking to play games". Trump said he was discussing two types of sunset provisions in which any of the countries could leave the deal.

Trump also tweets about having "great meetings and relationships" with the other leaders despite the tensions.

"We will continue to demonstrate that we're interested in defending Canadian interests and, on top of that, it turns out I'm defending American interests because these tariffs they're putting forward are going to hurt American workers as well", Trudeau said Thursday.